History of the VF14 tube and the Phaedrus Audio equivalent VF14M
Telefunken (Neumann) U47 + M7 capsule + VF14M tube FOR SALE - Soundgas
Telefunken VF14M Vacuum Tube - Used, Tested
NOS Telefunken VF14 Microphone Tube | TubeDepot.com
Telefunken VF14 - a very rare audio tube for Neumann microphone - MONODYN SPEZIALGESCHÄFT
Vf14 tube very rare version - Gearspace
Neumann U47 - The VF14 is a pentode, meaning it has five electrodes, including three grids. When used in a microphone, however, it operates as a triode, with two of its grids